Application that crashed: kontact
Version of the application: 4.3.4
KDE Version: 4.3.4 (KDE 4.3.4)
Qt Version: 4.5.3
Operating System: Linux 2.6.32-trunk-686 i686
Distribution: Debian GNU/Linux unstable (sid)

What I was doing when the application crashed:
I was trying to move some 20 emails or so from my Sent folder to my Inbox, and KMail just crashed.  The account is an IMAP email account through GMail.

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[KCrash Handler]
#6  QBasicAtomicInt::deref (this=<value optimized out>, other=<value optimized out>) at ../../include/QtCore/../../src/corelib/arch/qatomic_i386.h:132
#7  QString::operator= (this=<value optimized out>, other=<value optimized out>) at tools/qstring.cpp:1132
#8  0x4ae2b65f in KPIM::ProgressItem::setStatus (this=) at ../../libkdepim/progressmanager.cpp:118
#9  0x4bd36556 in KMFolderImap::checkValidity (this=<value optimized out>) at ../../kmail/kmfolderimap.cpp:1091
#10 0x4bd3b260 in KMFolderImap::qt_metacall (this=<value optimized out>, _c=<value optimized out>, _id=<value optimized out>, _a=<value optimized out>) at ./kmfolderimap.moc:178
#11 0x485aa963 in QMetaObject::activate (sender=<value optimized out>, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=<value optimized out>)
    at kernel/qobject.cpp:3112
#12 0x485ab5a2 in QMetaObject::activate (sender=<value optimized out>, m=<value optimized out>, local_signal_index=<value optimized out>, argv=) at kernel/qobject.cpp:3186
#13 0x4bcfcd59 in KMail::ImapAccountBase::connectionResult (this=) at ./imapaccountbase.moc:153
#14 0x4bd0299b in KMail::ImapAccountBase::slotSchedulerSlaveConnected (this=<value optimized out>, aSlave=<value optimized out>) at ../../kmail/imapaccountbase.cpp:663
#15 0x4bd0c126 in KMail::ImapAccountBase::qt_metacall (this=<value optimized out>, _c=<value optimized out>, _id=<value optimized out>, _a=<value optimized out>) at ./imapaccountbase.moc:129
#16 0x4bd14b2a in KMAcctImap::qt_metacall (this=<value optimized out>, _c=<value optimized out>, _id=<value optimized out>, _a=<value optimized out>) at ./kmacctimap.moc:77
#17 0x485aa963 in QMetaObject::activate (sender=<value optimized out>, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=<value optimized out>)
    at kernel/qobject.cpp:3112
#18 0x485ab5a2 in QMetaObject::activate (sender=<value optimized out>, m=<value optimized out>, local_signal_index=<value optimized out>, argv=) at kernel/qobject.cpp:3186
#19 0x49bb0a23 in KIO::Scheduler::slaveConnected (this=) at ./scheduler.moc:119
#20 0x49bb1d8d in KIO::SchedulerPrivate::slotSlaveConnected (this=<value optimized out>) at ../../kio/kio/scheduler.cpp:934
#21 0x49bb7506 in KIO::Scheduler::qt_metacall (this=<value optimized out>, _c=<value optimized out>, _id=<value optimized out>, _a=<value optimized out>) at ./scheduler.moc:104
#22 0x485aa963 in QMetaObject::activate (sender=<value optimized out>, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=<value optimized out>)
    at kernel/qobject.cpp:3112
#23 0x485ab5a2 in QMetaObject::activate (sender=<value optimized out>, m=<value optimized out>, local_signal_index=<value optimized out>, argv=) at kernel/qobject.cpp:3186
#24 0x49bc9747 in KIO::SlaveInterface::connected (this=) at ./slaveinterface.moc:159
#25 0x49bcd4d0 in KIO::SlaveInterface::dispatch (this=<value optimized out>, _cmd=<value optimized out>, rawdata=<value optimized out>) at ../../kio/kio/slaveinterface.cpp:220
#26 0x49bc9be7 in KIO::SlaveInterface::dispatch (this=<value optimized out>) at ../../kio/kio/slaveinterface.cpp:91
#27 0x49bbbbcd in KIO::Slave::gotInput (this=<value optimized out>) at ../../kio/kio/slave.cpp:322
#28 0x49bbe0b3 in KIO::Slave::qt_metacall (this=<value optimized out>, _c=<value optimized out>, _id=<value optimized out>, _a=<value optimized out>) at ./slave.moc:76
#29 0x485aa963 in QMetaObject::activate (sender=<value optimized out>, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=<value optimized out>)
    at kernel/qobject.cpp:3112
#30 0x485ab5a2 in QMetaObject::activate (sender=<value optimized out>, m=<value optimized out>, local_signal_index=<value optimized out>, argv=) at kernel/qobject.cpp:3186
#31 0x49ac7c07 in KIO::Connection::readyRead (this=) at ./connection.moc:86
#32 0x49ac9513 in KIO::ConnectionPrivate::dequeue (this=<value optimized out>) at ../../kio/kio/connection.cpp:82
#33 0x49ac98f6 in KIO::Connection::qt_metacall (this=<value optimized out>, _c=<value optimized out>, _id=<value optimized out>, _a=<value optimized out>) at ./connection.moc:73
#34 0x485a416b in QMetaCallEvent::placeMetaCall (this=) at kernel/qobject.cpp:477
#35 0x485a5c40 in QObject::event (this=<value optimized out>, e=<value optimized out>) at kernel/qobject.cpp:1110
#36 0x48c0ba34 in QApplicationPrivate::notify_helper (this=<value optimized out>, receiver=<value optimized out>, e=<value optimized out>) at kernel/qapplication.cpp:4065
#37 0x48c13b8e in QApplication::notify (this=<value optimized out>, receiver=<value optimized out>, e=<value optimized out>) at kernel/qapplication.cpp:3605
#38 0x4966702d in KApplication::notify (this=<value optimized out>, receiver=<value optimized out>, event=<value optimized out>) at ../../kdeui/kernel/kapplication.cpp:302
#39 0x4859584b in QCoreApplication::notifyInternal (this=<value optimized out>, receiver=<value optimized out>, event=<value optimized out>) at kernel/qcoreapplication.cpp:610
#40 0x4859648e in QCoreApplication::sendEvent (receiver=<value optimized out>, event_type=<value optimized out>, data=<value optimized out>)
    at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#41 QCoreApplicationPrivate::sendPostedEvents (receiver=<value optimized out>, event_type=<value optimized out>, data=<value optimized out>) at kernel/qcoreapplication.cpp:1247
#42 0x4859666d in QCoreApplication::sendPostedEvents (receiver=) at kernel/qcoreapplication.cpp:1140
#43 0x485c0b2f in QCoreApplication::sendPostedEvents (s=) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#44 postEventSourceDispatch (s=) at kernel/qeventdispatcher_glib.cpp:276
#45 0x41380b38 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#46 0x413843d0 in ?? () from /lib/libglib-2.0.so.0
#47 0x41384503 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#48 0x485c06a1 in QEventDispatcherGlib::processEvents (this=<value optimized out>, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:407
#49 0x48cab2a5 in QGuiEventDispatcherGlib::processEvents (this=) at kernel/qguieventdispatcher_glib.cpp:202
#50 0x48593e9a in QEventLoop::processEvents (this=<value optimized out>, flags=<value optimized out>) at kernel/qeventloop.cpp:149
#51 0x485942e2 in QEventLoop::exec (this=<value optimized out>, flags=<value optimized out>) at kernel/qeventloop.cpp:201
#52 0x48596739 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#53 0x48c0b8b7 in QApplication::exec () at kernel/qapplication.cpp:3525
#54 0x0804b4c6 in main (argc=1, argv=0xbfdf70c4) at ../../../kontact/src/main.cpp:218

Reported using DrKonqi